* {
    margin: 0;
    padding: 0;
}
body{
    user-select: none;
}

.box {
    width: 340px;
    height: 340px;
    border: 1px #00FFFF solid;
    position: relative;
    margin: 100px;
}

.box div {
    width: 100px;
    height: 100px;
    background-color: royalblue;
    text-align: center;
    line-height: 100px;
}

.div2 {
    position: absolute;
    top: 10px;
    left: 10px;
}

.div3 {
    position: absolute;
    top: 10px;
    left: 120px;
}

.div4 {
    position: absolute;
    top: 10px;
    left: 230px;
}

.div5 {
    position: absolute;
    top: 120px;
    left: 230px;
}

.div6 {
    position: absolute;
    top: 230px;
    left: 230px;
}

.div7 {
    position: absolute;
    top: 230px;
    left: 120px;
}

.div8 {
    position: absolute;
    top: 230px;
    left: 10px;
}

.div9 {
    position: absolute;
    top: 120px;
    left: 10px;
}

.button {
    width: 100px;
    height: 100px;
    background-color: #62c6a3;
    position: absolute;
    text-align: center;
    line-height: 100px;
    top: 120px;
    left: 120px;
}